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Enhancement in Surface Properties of Magnesium Alloy after Electroless Ternary Alloy Nano Composite Coating

Farook Sayyad, Shabnam Sayyad, M I Ansari


AZ91 Magnesium alloys have exceptional rigidity, low density, and electromagnetic protection properties, making them ideal for usage in numerous industrial components. But Magnesium alloys specially AZ91 have a significant disadvantage in terms of corrosion and hardness, which restricts their practical uses. One of the most recent ways for improving the corrosion and hardness of Mg alloys is electro-less nano-coating. This study investigates the hardness and corrosion properties of AZ91 Magnesium Alloy as a result of ENi-B-TiO2 Nano composite coating processes. It would be useful to conduct a thorough examination, including experimental analysis, into the possibilities of increasing the deposit efficiency and characteristics of composite deposits by designing a suitable bath composition and operating circumstances. It has been discovered that as the concentration of titania particles increases, so does the surface hardness of coatings. The optimal concentration of second-phase (titania) particles and bath agitation are also examined in order to get superior surface properties following Nano coating. Following this nano coating, the materials may be employed for a variety of materials engineering applications. The influence of coating parameters on the surface characteristics of ENi-B-TiO2 composite coatings was investigated in this study.


Electroless coatings, nano composite, surface properties, AZ91 alloy, bath agitation

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Ansari MI, Thakur DG. Influence of surfactant: Using electroless ternary nanocomposite coatings to enhance the surface properties on AZ91 magnesium alloy. Surfaces and Interfaces. 2017; 7: 20–8.

Sayyad F, Ansari I, Sayyad S. Micromechanical Modelling of SiC reinforced in 8090Al-Li alloy Metal Matrix Composite. International Journal of Advanced Science and Technology. 2020; 29 (3): 584–90.

Agarwala RC, Agarwala V. Electroless alloy/composite coatings: A review. Sadhana. 200; 28 (3): 475–93.

Bonin, L., Vitry, V. Applications of Electroless nickel and practical aspects. Electroless Nickel Plating. 1st ed. CRC Press: Boca Raton, U.S.; 2019. 411–424.


Chen BH, Hong L, Ma Y, Ko TM. Effects of surfactants in an electroless nickel-plating bath on the properties of Ni− P alloy deposits. Industrial & engineering chemistry research. 2002 May 29; 41 (11): 2668–78.

Doong JC, Duh JG, Tsai SY, Wang JH, Chiou BS. Corrosion behaviour of electroless nickel plating modified TiN coating. Surface and Coatings Technology. 1993; 58 (3): 157–61.

Elsentriecy HH, Azumi K. Electroless Ni–P deposition on AZ91 D magnesium alloy prepared by molybdate chemical conversion coatings. Journal of the Electrochemical Society. 2008; 156 (2): D70.

Krishnan KH, John S, Srinivasan KN, An overall aspect of electroless Ni-P depositions—A review article. Metallurgical and materials transactions A. 2006; 37 (6): 1917–26.

Liu Y, Zhao Q. Study of electroless Ni–Cu–P coatings and their anti-corrosion properties. Applied Surface Science. 2004; 228 (1–4): 57–62.

Ansari MI, Thakur DG. Effect of bath agitation on surface properties and corrosion behaviour of ENi-P coatings along with annealing temperature. Engineering Science and Technology, an International Journal. 2016; 19 (4): 2094–9.

Rudnik E, Kokoszka K, Łapsa J. Comparative studies on the electroless deposition of Ni–P, Co–P and their composites with SiC particles. Surface and Coatings Technology. 2008; 202 (12): 2584–90.

Sayyad F, Senanayake R. Experimental investigation on surface roughness of electroless Ni–B–TiO2 nanocomposite coatings. Sādhanā. 2021; 46 (2): 1–5.

Sayyad F, Senanayake R. Improving the deposit efficiency of nano composite deposits on AZ91 magnesium alloy by using a suitable bath composition and operating conditions. Materials Today: Proceedings. 2021; 47 (11): 2990–3. https://10.1016/j.matpr.2021.05.311

Singh C, Tiwari SK, Singh R. Deposition and characterization of electroless Ni on fluoride free pretreated AZ91 magnesium alloy. Materials Today: Proceedings. 2018; 5 (9): 17312–9.


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